Integrated root phenotypes for improved rice performance under low nitrogen availability.
Integrated root phenotypes for improved rice performance under low nitrogen availability.
复制标题
低氮条件下改善水稻生产性能的综合根系表型。
DOI：
10.1111/pce.14284
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发表时间：
2022-03
影响因子：
7.3
通讯作者：
Lynch, Jonathan P.
中科院分区：
文献类型：
--
作者：
Ajmera, Ishan;Henry, Amelia;Radanielson, Ando M.;Klein, Stephanie P.;Ianevski, Aleksandr;Bennett, Malcolm J.;Band, Leah R.;Lynch, Jonathan P.
关键词：
提高氮肥利用率将大大降低水稻生产的经济、能源和环境成本。我们假设，协同平衡的成本和效益的土壤勘探之间的根建筑phenes是有益的次优氮供应。水稻功能-结构模型OpenSimRoot与ORYZA_v3作物模型集成的增强实现用于评估根构型表型的组合的效用，即节根角度、较小直径节根的比例、节根数量;以及L型和S型侧枝密度，用于低氮下的植物生长。多个综合根系表型被确定为具有更大的地上部生物量在低氮比参考品种IR 64。这些表型的优势是由于根phenes之间的协同作用，而不是预期的添加剂效果的phenene状态。在未来的天气条件下，与IR 64相比，预测代表性的最佳表型在低氮供应的情况下，在干燥的直接播种农业生态系统中具有高达80%的谷物产量。这些表型值得考虑作为根理想型，用于在有限的氮可用性的干旱直播条件下培育具有提高产量的水稻品种。苯增效作用对综合表型表现的重要性对作物育种具有重要意义。多尺度机理模型确定了几个综合根系表型水稻上级产量低氮供应。根表型表现的一个重要组成部分之间的协同作用。
Greater nitrogen efficiency would substantially reduce the economic, energy and environmental costs of rice production. We hypothesized that synergistic balancing of the costs and benefits for soil exploration among root architectural phenes is beneficial under suboptimal nitrogen availability. An enhanced implementation of the functional–structural model OpenSimRoot for rice integrated with the ORYZA_v3 crop model was used to evaluate the utility of combinations of root architectural phenes, namely nodal root angle, the proportion of smaller diameter nodal roots, nodal root number; and L‐type and S‐type lateral branching densities, for plant growth under low nitrogen. Multiple integrated root phenotypes were identified with greater shoot biomass under low nitrogen than the reference cultivar IR64. The superiority of these phenotypes was due to synergism among root phenes rather than the expected additive effects of phene states. Representative optimal phenotypes were predicted to have up to 80% greater grain yield with low N supply in the rainfed dry direct‐seeded agroecosystem over future weather conditions, compared to IR64. These phenotypes merit consideration as root ideotypes for breeding rice cultivars with improved yield under rainfed dry direct‐seeded conditions with limited nitrogen availability. The importance of phene synergism for the performance of integrated phenotypes has implications for crop breeding. Multiscale mechanistic modelling identified several integrated root phenotypes in rice with superior yield under low N availability. Synergism among root phenes was an important component of phenotypic performance.
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影响因子：
4.9
作者：
Confalonieri, Roberto;Bregaglio, Simone;Bouman, Bas
通讯作者：
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通讯作者：
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